Remote listening systemsClassification of sea floorUnderwater acoustic recordersAutonomous Underwater Vehicule

Underwater acoustic recorders


RTsys manufactures a wide range of advanced underwater listening systems. Very broadband, low-power and flexible. Rtsys recording solutions offer a variety of deployment and applications crossed with calibrated data.

RTsys proposes, multi-task smart-hydrophone and autonomous mutlichannel recorders, very low-power autonomous recorders, hydrophones…


TR-SDA14 is a suitcase recorder able to acquire up to 4 wideband hydrophones simultaneously.

EASDA14-1000 autonomous underwater acoustic recorder


Broadband & long-term autonomous hydrophone recorder

  • broadband over 500 kHz
  • over 85 days in continuous recording
  • 700 meters depth
  • below sea-state zero capabilities
  • +/-0.2 dB electronic calibration
  • dynamic range > 100 dB
  • additional sensors (temperature, pressure, etc.)
  • flexible choice of calibrated hydrophone sensors
EASDA14 recorder

EA-SDA14 recorder

Versatile multi-hydrophone recorder, easy to use with high level of performances.

  • 4 synchronized hydrophone inputs
  • Broadband: 3 Hz to 1000 kHz
  • Below seastate zero measurements
  • > 100 dB dynamic range and +/-0.2 dB calibration
  • Multiple operation modes – drift, towed, autonomous
  • Simple configuration accessible by web interface
  • Additional sensors – GPS, temperature, pressure

Hydrophone sensors

RTsys proposes a wide range of hydrophone sensors compatible with their systems.

RTsys can advise you to select the best hydrophone configuration adapted to your need.

  • Broadband hydrophones sensors
  • Low sensitive passive hydrophones
  • Below seastate zero hydrophones
  • Cable length

SYLence recorder

Very low-power autonomous underwater acoustic recorder.
The most compact and cost effective underwater noise recording autonomous system.

  • Single hydrophone input with variable cable length
  • Up to 192 kHz sampling rate
  • Only 600 mW in recording mode
  • Less than 1mW in sleep mode
  • Up to 256 GB on SD Card

Tripod – multi-hydrophone structure

Seabed hydrophone structure for EA-SDA14 and 4 hydrophones that can be used for trajectory measurements.

  • Adapted to all type of hydrophone
  • Short & long term deployments
  • Light & easy to deploy
  • Variable sizes and hydrophone distances

EA-SDA Software Suite

RTsys offers a full software and tools suite for acousticians and nonacousticians to carry underwater noise analysis. It is compatible with all RTsys underwater listening systems :

  • EA-SDA14
  • EA-SDA1000
  • SYLence
  • BA-SDA14
  • RB-SDA14
  • TR-SDA14


TR-SDA14 is a suitcase recorder able to acquire up to 4 wideband hydrophones simultaneously. It accepts both passive and pre-amplified active hydrophones.